BDO TDS (Dairen) - 20140409-01

1,4-Butanediol (BDO)
Description:
1,4-Butanediol is a colorless, high-boiling liquid with a low odor of toxicity. 1,4-
butanediol is completely soluble in water, most alcohol, esters, ketones, glycol ethers
and acetates, but may be immiscible or partially miscible in common aliphatic and
aromatic/ chlorinated hydrocarbons.1,4-butanediol is a versatile chemical
intermediate because of its terminal, primary hydroxyl groups and its hydrophilic and
chemical resistant nature. Polymers produced upon reaction with diacids or
diisocyanates are the basis for many commercial polyurethane and polyester
applications.
Specification:
SPECIFICATION OF 1,4-BUTANEDIOL
ITEMS SPECIFICATION
1.Assay wt % 99.5 min.
2.Water wt % 0.05 max.
3.Carbonyl mg KOH/g 0.5 max.
4.Color APHA 10 max.

5.Appearance(above 20oC) Clear & Free of Suspended Matter
Physical Properties:
Boiling Point (760 torr) 228℃
Freezing Point 19~20℃
Specific Gravity (20℃/20℃) 1.015
Hydroxyl Value 1245
Flash Point (Cleveland Open Cup) 155℃
Ignition Temperature 370℃
Applications:
The following flowchart summarizes the major applications of 1,4-butanediol.
H O C H 2C H 2C H 2C H 2O H
1 ,4 -b u ta n e d io l
p o ly u re th a n e p o ly e ste rs
COOCH3
e la s to m e r
O
O O
γ− b u ty ro la c to n e
te tra h y d ro fu ra n (T H F )
COOCH3
d im e th y l
+ te re p h th a la te
s o lv e n t
u se s or COOH
H O (C H 2 C H 2 C H 2 C H 2 O )n H
p o ly te tra m e th y le n e e th e r
g ly c o l(P T M E G )
O O
N N
H COOH
CH3
2 -p y rro lid o n e N -m e th y l-2 -p y rro lid o n e (N M P ) te re p h th a lic a c id
HO [-(C H 2 ) 4 O O C C O O -] n (C H 2 ) 4 O H
O O
N N
p o ly b u ty le n e te re p h th a la te
C H 2 -C H 2 - CH=CH2
n
p o ly v in y lp y rro lid o n e N -v in y l-2 -p y rro lid o n e
Tetrahydrofuran & PTMEG. Tetrahydrofuran is the largest use for 1,4-butanediol and
approximately 79% of THF consumption is for the production of polytetramethylene ether
glycol(PTMEG), which in turn is used in the manufacture of cast and thermoplastic urethane
elastomers, polyurethane fibers (spandex) and high-performance copolyester-ether
elastomers. The remaining 21% of THF consumption is for use as a solvent in the
manufacture of polyvinyl chloride cements and coatings, in precision magnetic tape and as a
reaction solvent in the production of pharmaceuticals.
γ-Butyrolactone (GBL). 1,4-Butanediol is used as raw material for the manufacture of GBL.
About 65% of GBL consumption is for the manufacture of N-methyl-2-pyrrolidone (NMP),
which in turn is used as a solvent in lube oil extraction, electronics applications, paint
strippers, magnetic wire coatings and engineering resins. About 25% of GBL consumption is
used in the manufacture of 2-pyrrolidone/N-vinyl-2-pyrrolidone/polyvinylpyrrolidone, which in
turn is used in the production of copolymers; in consumer and pharmaceutical applications,
including cosmetics, hair sprays, germicides and tablet binders; in the paper, textile and
agricultural industries; and in miscellaneous applications, such as process aids in beverage
clarification. The remaining 10% of GBL is consumed primarily as an agricultural solvent and
for lithographic use in photography.
Thermoplastic Polyesters. 1,4-Butanediol is used to manufacture polybutylene

terephthalate (PBT). PBT's high strength, excellent thermal stability and good
durability lead to its many uses in the automotive, electrical and appliance industries.
PBT is also compatible with several other thermoplastics with several other
thermoplastics which enables a compounder to tailor a polymer alloy to an end user's
specifications.
Polyesters. In polyurethane applications, 1,4-butanediol is primarily used as a

component of polyesters or as a chain extender. For example, polyesters such as
poly (butylene adipate) diols are formulated into urethane elastomers with excellent
oil, chemical and UV resistance. In addition, these materials have good mechanical
properties over a broad temperature range, as well as good flex and abrasion
resistance.
Polyester Plasticizers. 1,4-Butanediol based polyester plasticizers impart superior

compatibility with vinyl polymers while providing non-migrating characteristics. In
addition, polyesters based upon 1,4-butanediol have excellent oxidation resistance
and good low temperature flexibility.
As a chain extender with MDI systems, 1,4-butanediol provides a good balance

between hardness and low temperature flexibility. On comparison to other diols, 1,4-
butanediol combines the best attributes of hydroxyl reactivity, linearity and overall
system compatibility to build in the proper crystallinity required in the polyurethane
hard segment. Also, the 1,4-butanediol/MDI systems provide a lower exposure
hazard than MOCA/TDI systems.
1,4-Butanediol is used as a chain extender for thermoplastic urethane elastomers.

1,4-butanediol yields crystalline urethane domains which readily melt and flow at
elevated temperatures but phase separate at ambient temperatures in order to yield
tough elastometric networks.
Cast urethane elastomers continue to be a major end use of 1,4-butanediol because

of overall consistency and reliability.
Urethane RIM elastomers using 1,4-butanediol allow design freedom and parts
consolidation with large, complex shapes.
Current applications of 1,4-butanediol based urethane elastomers include automotive
front and rear end fascia, bumpers, fenders and spoilers. Non-automotive
applications include footwear, electrical enclosures, recreation equipment, appliances
and furniture.
Copolyester Hot Melt and Solvent Borne Adhesives. 1,4-Butanediol is a key

component of copolyesters of isophthalic acid and terephthalic acid used in hot melt
adhesive applications. 1,4-butanediol yields polyesters with excellent adhesive and
cohesive strength.
Storage and Handling:

In the presence of strong acids, 1,4-butanediol is dehydrated to tetrahydrofuran.
Keep away from heat, sparks, and flame. Since 1,4-butanediol solidifies at
temperatures below 19℃, appropriate storage temperatures are required; however,
reliquidation does not alter its properties. 1,4-butanediol can be shipped and stored in
mild steel; however, coated tanks or stainless steel will prolong.

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1,4-Butanediol (BDO)

1.Assay wt % 99.5 min.

2.Water wt % 0.05 max.

3.Carbonyl mg KOH/g 0.5 max.

4.Color APHA 10 max.

p o ly v in y lp y rro lid o n e N -v in y l-2 -p y rro lid o n e

Thermoplastic Polyesters. 1,4-Butanediol is used to manufacture polybutylene

Polyesters. In polyurethane applications, 1,4-butanediol is primarily used as a

Polyester Plasticizers. 1,4-Butanediol based polyester plasticizers impart superior

As a chain extender with MDI systems, 1,4-butanediol provides a good balance

1,4-Butanediol is used as a chain extender for thermoplastic urethane elastomers.

Cast urethane elastomers continue to be a major end use of 1,4-butanediol because

Copolyester Hot Melt and Solvent Borne Adhesives. 1,4-Butanediol is a key

Storage and Handling:

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